Rivet gauge



Sept. 15, 1942. s. c. GREENLl-:AF

'RIVET GAUGE Filed Sept. 8, `194.1

ATTORNEYS Patented Sept. 15, 1942 UNITED STATES PATENT OFFICE RIVETGAUGE- Stanley C. Greenleaf, San Diego, Calif. Application September 8,1941, Serial No. 410,068 8 Claims. (Cl. 33-143) My invention relates tothe selection of rivets with respect to correct lengths for holes ofpredetermined and variable diameters, and has among its objectsV andadvantages the provision of an improved rivet gauge.

Figure 1 is an elevational view of the rivet gauge illustrating themanner in which it is applied to a piece of 4work for determiningcorrect rivet length for a bore of given diameter;

Figure 2 is a view illustrating the rivet gauge apart from the. work andas it may be carried on the person;

Figure 3 is a longitudinal sectional view of the gauge;

Figure 4 is an enlarged sectional view taken along the line 4-4 ofFigure 2;

Figure 5 is an enlarged view of a portion of one part of the gaugeillustrating a portion of the rivet length scale; i

Figure 6 is a perspective view of a portion of the part illustrated inFigure 5; and

Figure 7 is a fragmentary view of another part of the gauge illustratingthe rivet diameter scale which operates in conjunction with the scale ofFigure 5 for indicating the correct rivet lengths based on therespective diameters thereof.

In the embodiment selected to illustrate the invention, I make. use of arst 4tube I0 slidable in a second tube or grip II, To the closed end I2of the tube is secured a rod I3, as by the riveted connection I4. A diskI5 is secured to the rod I3 intermediate its ends, with the diskslidably fitted inside the tube I0.

The outer end of the tube I is provided with a wall I6 bored forslidably receiving the rod I3, the latter being provided with awork-engaging pin I1 which normally engages the Work-engaging face I8 ofthe Wall |6. Such engagement is yieldingly maintained by reason of acompression spring I9 having one end abutting the wall I6 and its otherend engaging the disk I5. Thus the spring I9 normally maintains thetubes l0 and in the positions of Figures 2 and 3, and the pin I1restrains the tube IIJ from further outward movement with respect to thetube Il.

While the two tubes `||l and are arranged for relative axial movement,the two tubes are also arranged for relative rotary motion inpredetermined steps or degrees. To the inner end of the tube I0 issecured a resilient finger 20 having a small head 2| arranged toselectively enter grooves 22 in the tube fashioned by reason of ribs 23struck therefrom. There are twelve grooves 22, which grooves arepositionally related to the i -two and one-half inches.

tube I I. Because of the resilient nature of the nger 20, the tube I Imay easily be rotated relatively to the tube I0, but location of thehead 2| in one of the grooves 22 restrains the two tubes from accidentalrelative rotation.

In Figure 6, the outer face of the tube l0 is provided with alongitudinal groove 24 in which the plate 25 of the finger 20 ispositioned and made secure by peening the tube, as at 26. 'I'he depth ofthe groove 24 is slightly greater than the thickness of the plate 25 soas to eliminate any obstructing formations with respect to the tube Il.n

The inner end of the tube is provided with a spirally fashioned edge 21,this helix having a three-eighth inch pitch. The outer face of the tube-I| adjacent the edge 21 is provided with twelve division lines 28marked in fractional inches, as at 29, to represent common rivetdiameters. 'Ihe spaces between the conventional rivet diameter lines 28may be subdivided, as at 30.

On the outer faceof the tube I9 is provided a scale 3| for determiningthe lengths of rivets having diameters selected from the scale on thetube II. The scale 3| has an overall length of The inch linesareindicated at 32 and the scale is also provided with fractional inchlines 33 of Additional division lines may be provided, as

illustrated in Figures l, 2 and 5.

In the normal position of the tube, as in Figure 2, the straight edge 34on the tube I may be brought into registration with the index line 35running through the scale 3| longitudinally of the tube l0. In thisposition, the window 36 in the tube exposes the zero 31 of the scale 3|,and the Window 38 exposes the zero line 39. A line 30 is provided on therib 4| separating the two windows 36 and 38, which line is then inregistration with the zero line 39.

In operation, the rod I3 may be projected from the tube I0 by pressingthe tube II downwardly on the tube IU. The rod I3 is then inserted inthe bore 42 for positioning the pin |1 underthe work 43. The tension ofthe spring I9 will bring the face I8 into further engagement with theopposite face of the work 43. 'I'he tube is then rotated on the tube I0to bring the division line 28 corresponding to the predetermined rivetdiameter into registration with the line 35. At this time the rivetlength is determined by noting the intersecting position of the edge 21with respect to the scale 3|.

Figure 1 illustrates the tube positioned with rivet diameter scale onthe its three-eighth-inch line 28 in registration with one-eighth inchvalues.

2 the line 35, at which time the edge 21 indicates a rivet length of oneand one-fourth inch, this being the required length of the rivet for athreeeighth-inch bore in work of the thickness illustrated. This readinggives the grip length plus 5 the amount necessary to form a regulationsize flat head rivet. The Vgrooves 22 are so spaced and selectivelycoact with the nger 2l as to yieldingly latch the tubes I0 and Il in therespective relative positions of the tube correspondl0 ing to the twelverivet diameters indicated by the divisional lines 28. The one-eighth andone-halfinch division line of the rivet diameter scale is indicated at44, see Figure '7, and aligns the edge 21. 'Ihe spring I9 permits theoperator 15 to insert the rivet gauge into theV hole and take a readingwith one hand.

The rivet gauge may be used as a simple Ycaliper by positioning the tubeIl in accordance lwith Figure V2. Under such conditions, the-reading is20 taken in connection'withthe line l5` adjacent the`V window-36 andlabeled-Outf designating outside measurement.V The rivet gauge may beemployed as a-depth gauge, as the pinY l1 isipositionedexactlyone-eighth inchfrom the end of 25 the 'rod I3, at which time thereading istaken Y from the line 46 labeled-In. The Window- 38' exposesthe division-'lines Yofthe Yscale 3|, While the Window 36 exposes -thenurneralsfll of the*V scale.V f

A pencil clip 4B is connected with the -tube Il, with the rivet gauge soproportioned that the tool may be carried in the pocket. Y 1

YWithout Ifurther elaboration, the nforegoing -will so fully illustratemy invention, that others-ma-y,v 35 by applyingcurrentknowledge,readilyadapt thel same for use under variousconditions-ofI Yservice.Y

1.,'A-rivet gauge-for determining the length of rivets for holes ofpredetermined diameters `com- 4.0 prising a work-engagingmemberrprovided with-a rivet length scale having an index'meansyacompanion work-engaging means having anelement` for projection throughthe hole in the Work being` measured land Y slidablyy and rotatablyconnected '45 with said'member, said work-engaging means being providedwith a rivet diameter scaletraversing said rivet length scale and*adjustable rela-vr tively thereto through` rotation -of saidV work#engaging means relatively to said member, 50 and Yareading-locator onsaid-work-engaging means traversingsaid rivetlength scale forindicatingthe'rivet length-for a'hole'of-A givenV diameter when saiddiameter'scale'is adjusted tov a position for vregistering'thatdiameteron the 55 scale with said index means.n Y Y i 2. The inventiondescribed in claim 1 wherein' said reading locator comprises'an edge ofhelical formation formed on said work-engaging means.

3. The invention described in claim 1 wherein 60 said companionwork-engaging-means comprises" in part a-tube slidably and rotatablyembracingA said work-engaging member, with said reading locatorcomprising a spirally contoured iend of thetube. V- f 4; lThe inventiondescribed'in claim 1 wherein` said work-engaging*V member andY saidworkengaging means are each of tubular formation, with the `tube of thework-engaging means embracing the tube of the work-engaging member, 70said element comprising fa rod located inside both tubes and secured tothe tube of the work-engaging means and projecting beyond one endthereof, a projection on the rod exteriorhT of said work-engagingmember, and a spring acting on said rod and said work-engaging memberfor yieldingly holding said projection in engagement with saidwork-engaging member.

5. The invention described in claim 1 wherein the said rivet diameterscale includes divisions, and wherein yielding latch means are providedfor yieldingly restraining relative rotary movement of the member withrespect to said workengaging means in positions corresponding to saiddivisions.

Y6. A rivet gauge for determining the respective lengths of rivets forholes of predetermined diameters comprising a work-engaging tubeprovidedwith a rivet length scale extending longitudinally thereof andhaving an index line, a companion tube slidably andl rotatably embracingsaid work-engaging tube and having. a helically contoured end rotatablytraversingsaid rivet length scale, a rod attached to one end ofvsaidcompanion tube and extending through Vthe workengaging tube to aposition exteriorly thereof', a work-engaging pin secured .to saidrodexteriorly of the work-engaging. tube, a spring acting-on said rod andsaid work-engag-ingtube for normally holdingV said pin in engagement-vvth `one endV of the work-engaging tube, saidllelically contoured edgecomprising a readingY locator-for indicating the rivet length for a-holevof given diameter when said diameter scale is adjustedto a position forregistering that. diameter ongthe scale with said index line, saidcompanion tube having an edge arrangedliorY -registrationwith saidYindex line throughrotation ofthe companion tube on the work-engagingtube, Vsaid rivet length scale including divisionsv and numericalindicia -associated with said divisions, .and Ysaid companion tube beingprovidedY with .windows respectively exposing said divisions-and saidnumerical indicia whensaid edge is Vinlregistration withsaid indexline.7. The invention described inciaim V1 wherein said rivet diameterscaleincludes divisions,-` said work-engaging means comprising- .a .tubeVrotati ably and slidably embracingsaidwork-engaging member, said tubebeingfashioned .withgrooves extending longitudinally thereoL-and.resilient means selectively.receivablein said groovesior yieldinglylatching the tube to the work-engaging member inpositions correspondingto-said .divisions Y Y Y 8. The Y invention described in claim. 1-whereinsaid work-engaging means comprises -avtube slidably yandrotatably embracing said work-engaging member, ashaft,ixed.tosaidWork-engagingV means and having a work-engaging -pinlocated exteriorlyV of Vsaid work-engaging member,V said rivet lengthscale including divisions and numerical indicia associated with saiddivisions, and said tubebeing providedwith, windows respectivelyexposing said divisions and said numerical indicia when said tube ismoved.- longituolinally on said work-engaging member, Ywith said windowsprovided with indicators coaoting with saidrivet length scale toindicate the respectiveA distances from the end of'said shaft and saidpin andthe work-engaging member.`

STANLEY C. GREENLEAF.

